lib/remoteproc/drivers/zynqmp_remoteproc_a53.c

   1 /*
   2  * Copyright (c) 2014, Mentor Graphics Corporation
   3  * All rights reserved.
   4  * Copyright (c) 2015 Xilinx, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright notice,
  12  *    this list of conditions and the following disclaimer in the documentation
  13  *    and/or other materials provided with the distribution.
  14  * 3. Neither the name of Mentor Graphics Corporation nor the names of its
  15  *    contributors may be used to endorse or promote products derived from this
  16  *    software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /**************************************************************************
  32  * FILE NAME
  33  *
  34  *       platform.c
  35  *
  36  * DESCRIPTION
  37  *
  38  *       This file is the Implementation of IPC hardware layer interface
  39  *       for Xilinx Zynq ZC702EVK platform.
  40  *
  41  **************************************************************************/
  42
  43 #include "openamp/hil.h"
  44 #include "machine.h"
  45
  46 /* -- FIX ME: ipi info is to be defined -- */
  47 struct ipi_info {
  48         uint32_t ipi_base_addr;
  49         uint32_t ipi_chn_mask;
  50 };
  51
  52 /*--------------------------- Declare Functions ------------------------ */
  53 static int _enable_interrupt(struct proc_vring *vring_hw);
  54 static void _notify(int cpu_id, struct proc_intr *intr_info);
  55 static int _boot_cpu(int cpu_id, unsigned int load_addr);
  56 static void _shutdown_cpu(int cpu_id);
  57 static void _ipi_handler(int vect_id, void *data);
  58 static void _ipi_handler_deinit(int vect_id, void *data);
  59 static void _reg_ipi_after_deinit(struct proc_vring *vring_hw);
  60
  61 /*--------------------------- Globals ---------------------------------- */
  62 struct hil_platform_ops proc_ops = {
  63         .enable_interrupt = _enable_interrupt,
  64         .reg_ipi_after_deinit = _reg_ipi_after_deinit,
  65         .notify = _notify,
  66         .boot_cpu = _boot_cpu,
  67         .shutdown_cpu = _shutdown_cpu,
  68 };
  69
  70 /* Extern functions defined out from OpenAMP lib */
  71 extern void ipi_enable_interrupt(unsigned int vector);
  72 extern void ipi_isr(int vect_id, void *data);
  73
  74 /* static variables */
  75 static struct ipi_info saved_ipi_info;
  76
  77 /*------------------- Extern variable -----------------------------------*/
  78 extern struct hil_proc proc_table[];
  79 extern const int proc_table_size;
  80
  81 void _ipi_handler(int vect_id, void *data)
  82 {
  83         (void) vect_id;
  84         struct proc_vring *vring_hw = (struct proc_vring *)(data);
  85         struct ipi_info *chn_ipi_info =
  86                 (struct ipi_info *)(vring_hw->intr_info.data);
  87         unsigned int ipi_base_addr = chn_ipi_info->ipi_base_addr;
  88         unsigned int ipi_intr_status =
  89             (unsigned int)HIL_MEM_READ32(ipi_base_addr + IPI_ISR_OFFSET);
  90         if (ipi_intr_status & chn_ipi_info->ipi_chn_mask) {
  91                 platform_dcache_all_flush();
  92                 platform_isr(vect_id, data);
  93                 HIL_MEM_WRITE32((ipi_base_addr + IPI_ISR_OFFSET),
  94                                 chn_ipi_info->ipi_chn_mask);
  95         }
  96 }
  97
  98 void _ipi_handler_deinit(int vect_id, void *data)
  99 {
 100         (void) vect_id;
 101         struct ipi_info *chn_ipi_info =
 102                 (struct ipi_info *)(data);
 103         unsigned int ipi_base_addr = chn_ipi_info->ipi_base_addr;
 104         unsigned int ipi_intr_status =
 105             (unsigned int)HIL_MEM_READ32(ipi_base_addr + IPI_ISR_OFFSET);
 106         if (ipi_intr_status & chn_ipi_info->ipi_chn_mask) {
 107                 HIL_MEM_WRITE32((ipi_base_addr + IPI_ISR_OFFSET),
 108                                 chn_ipi_info->ipi_chn_mask);
 109         }
 110         return;
 111 }
 112
 113 static int _enable_interrupt(struct proc_vring *vring_hw)
 114 {
 115         struct ipi_info *chn_ipi_info =
 116             (struct ipi_info *)(vring_hw->intr_info.data);
 117         unsigned int ipi_base_addr = chn_ipi_info->ipi_base_addr;
 118
 119         if (vring_hw->intr_info.vect_id == 0xFFFFFFFF) {
 120                 return 0;
 121         }
 122
 123         /* Register ISR */
 124         env_register_isr_shared(vring_hw->intr_info.vect_id,
 125                          vring_hw, _ipi_handler, "remoteproc_a53", 1);
 126         /* Enable IPI interrupt */
 127         env_enable_interrupt(vring_hw->intr_info.vect_id,
 128                              vring_hw->intr_info.priority,
 129                              vring_hw->intr_info.trigger_type);
 130         HIL_MEM_WRITE32((ipi_base_addr + IPI_IER_OFFSET),
 131                 chn_ipi_info->ipi_chn_mask);
 132         return 0;
 133 }
 134
 135 /* In case there is an interrupt received after deinit. */
 136 void _reg_ipi_after_deinit(struct proc_vring *vring_hw)
 137 {
 138         struct ipi_info *chn_ipi_info =
 139             (struct ipi_info *)(vring_hw->intr_info.data);
 140
 141         if (vring_hw->intr_info.vect_id == 0xFFFFFFFF)
 142                 return;
 143         saved_ipi_info.ipi_base_addr = chn_ipi_info->ipi_base_addr;
 144         saved_ipi_info.ipi_chn_mask = chn_ipi_info->ipi_chn_mask;
 145
 146         env_update_isr(vring_hw->intr_info.vect_id, &saved_ipi_info,
 147                     _ipi_handler_deinit,
 148                     "remoteproc_a53", 1);
 149 }
 150
 151 void _notify(int cpu_id, struct proc_intr *intr_info)
 152 {
 153
 154         (void)cpu_id;
 155         struct ipi_info *chn_ipi_info = (struct ipi_info *)(intr_info->data);
 156         if (chn_ipi_info == NULL)
 157                 return;
 158         platform_dcache_all_flush();
 159         env_wmb();
 160         /* Trigger IPI */
 161         HIL_MEM_WRITE32((chn_ipi_info->ipi_base_addr + IPI_TRIG_OFFSET),
 162                         chn_ipi_info->ipi_chn_mask);
 163 }
 164
 165 int _boot_cpu(int cpu_id, unsigned int load_addr)
 166 {
 167         (void)cpu_id;
 168         (void)load_addr;
 169         return -1;
 170 }
 171
 172 void _shutdown_cpu(int cpu_id)
 173 {
 174         (void)cpu_id;
 175         return;
 176 }
 177
 178 /**
 179  * platform_get_processor_info
 180  *
 181  * Copies the target info from the user defined data structures to
 182  * HIL proc  data structure.In case of remote contexts this function
 183  * is called with the reserved CPU ID HIL_RSVD_CPU_ID, because for
 184  * remotes there is only one master.
 185  *
 186  * @param proc   - HIL proc to populate
 187  * @param cpu_id - CPU ID
 188  *
 189  * return  - status of execution
 190  */
 191 int platform_get_processor_info(struct hil_proc *proc , int cpu_id)
 192 {
 193         int idx;
 194         for(idx = 0; idx < proc_table_size; idx++) {
 195                 if((cpu_id == HIL_RSVD_CPU_ID) || (proc_table[idx].cpu_id == cpu_id) ) {
 196                         env_memcpy(proc,&proc_table[idx], sizeof(struct hil_proc));
 197                         return 0;
 198                 }
 199         }
 200         return -1;
 201 }
 202
 203 int platform_get_processor_for_fw(char *fw_name)
 204 {
 205         (void)fw_name;
 206         return 1;
 207 }